SA516 GR70 or Q235 or A36 pressure vessel/dish end SA516-70 pressure vessel, dishing , conical shape, flat roof shape, spherical SA516 ... , un-standard dish head and so on.The vessel heads (stainless steel, pressure vessel steel, SA516-70, American standard) manufactured by our ... can also press U-type revert ring, expansion joint, big/small-mouthed tapered step, butt welded elbow, manhole, handhole, ...